chore: robots, favicon e smoke test

scripts/smoke.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -euo pipefail
+cd "$(dirname "$0")/.."
+npm run build
+PORT=4399 node --env-file=.env ./dist/server/entry.mjs & SRV=$!
+trap 'kill $SRV' EXIT
+sleep 2
+fail=0
+for path in / /about /training /programs /programs/performance-class /programs/rehab /blog /contact /admin/login /robots.txt; do
+  code=$(curl -s -o /dev/null -w '%{http_code}' "http://localhost:4399$path")
+  echo "$code $path"
+  [ "$code" = "200" ] || fail=1
+done
+code=$(curl -s -o /dev/null -w '%{http_code}' http://localhost:4399/admin)
+echo "$code /admin (atteso 302)"
+[ "$code" = "302" ] || fail=1
+exit $fail